diff -Naurd mpfr-3.1.2-a/PATCHES mpfr-3.1.2-b/PATCHES
--- mpfr-3.1.2-a/PATCHES	2013-09-26 10:52:52.000000000 +0000
+++ mpfr-3.1.2-b/PATCHES	2013-09-26 10:52:52.000000000 +0000
@@ -0,0 +1 @@
+exp_2
diff -Naurd mpfr-3.1.2-a/VERSION mpfr-3.1.2-b/VERSION
--- mpfr-3.1.2-a/VERSION	2013-03-13 15:37:28.000000000 +0000
+++ mpfr-3.1.2-b/VERSION	2013-09-26 10:52:52.000000000 +0000
@@ -1 +1 @@
-3.1.2
+3.1.2-p1
diff -Naurd mpfr-3.1.2-a/src/exp_2.c mpfr-3.1.2-b/src/exp_2.c
--- mpfr-3.1.2-a/src/exp_2.c	2013-03-13 15:37:28.000000000 +0000
+++ mpfr-3.1.2-b/src/exp_2.c	2013-09-26 10:52:52.000000000 +0000
@@ -204,7 +204,7 @@
           for (k = 0; k < K; k++)
             {
               mpz_mul (ss, ss, ss);
-              exps <<= 1;
+              exps *= 2;
               exps += mpz_normalize (ss, ss, q);
             }
           mpfr_set_z (s, ss, MPFR_RNDN);
diff -Naurd mpfr-3.1.2-a/src/mpfr.h mpfr-3.1.2-b/src/mpfr.h
--- mpfr-3.1.2-a/src/mpfr.h	2013-03-13 15:37:37.000000000 +0000
+++ mpfr-3.1.2-b/src/mpfr.h	2013-09-26 10:52:52.000000000 +0000
@@ -27,7 +27,7 @@
 #define MPFR_VERSION_MAJOR 3
 #define MPFR_VERSION_MINOR 1
 #define MPFR_VERSION_PATCHLEVEL 2
-#define MPFR_VERSION_STRING "3.1.2"
+#define MPFR_VERSION_STRING "3.1.2-p1"
 
 /* Macros dealing with MPFR VERSION */
 #define MPFR_VERSION_NUM(a,b,c) (((a) << 16L) | ((b) << 8) | (c))
diff -Naurd mpfr-3.1.2-a/src/version.c mpfr-3.1.2-b/src/version.c
--- mpfr-3.1.2-a/src/version.c	2013-03-13 15:37:34.000000000 +0000
+++ mpfr-3.1.2-b/src/version.c	2013-09-26 10:52:52.000000000 +0000
@@ -25,5 +25,5 @@
 const char *
 mpfr_get_version (void)
 {
-  return "3.1.2";
+  return "3.1.2-p1";
 }
diff -Naurd mpfr-3.1.2-a/PATCHES mpfr-3.1.2-b/PATCHES
--- mpfr-3.1.2-a/PATCHES	2013-09-26 10:56:55.000000000 +0000
+++ mpfr-3.1.2-b/PATCHES	2013-09-26 10:56:55.000000000 +0000
@@ -0,0 +1 @@
+fits-smallneg
diff -Naurd mpfr-3.1.2-a/VERSION mpfr-3.1.2-b/VERSION
--- mpfr-3.1.2-a/VERSION	2013-09-26 10:52:52.000000000 +0000
+++ mpfr-3.1.2-b/VERSION	2013-09-26 10:56:55.000000000 +0000
@@ -1 +1 @@
-3.1.2-p1
+3.1.2-p2
diff -Naurd mpfr-3.1.2-a/src/fits_u.h mpfr-3.1.2-b/src/fits_u.h
--- mpfr-3.1.2-a/src/fits_u.h	2013-03-13 15:37:35.000000000 +0000
+++ mpfr-3.1.2-b/src/fits_u.h	2013-09-26 10:56:55.000000000 +0000
@@ -32,17 +32,20 @@
   int res;
 
   if (MPFR_UNLIKELY (MPFR_IS_SINGULAR (f)))
-    /* Zero always fit */
-    return MPFR_IS_ZERO (f) ? 1 : 0;
-  else if (MPFR_IS_NEG (f))
-    /* Negative numbers don't fit */
-    return 0;
-  /* now it fits if
-     (a) f <= MAXIMUM
-     (b) round(f, prec(slong), rnd) <= MAXIMUM */
+    return MPFR_IS_ZERO (f) ? 1 : 0;  /* Zero always fits */
 
   e = MPFR_GET_EXP (f);
 
+  if (MPFR_IS_NEG (f))
+    return e >= 1 ? 0  /* f <= -1 does not fit */
+      : rnd != MPFR_RNDN ? MPFR_IS_LIKE_RNDU (rnd, -1)  /* directed mode */
+      : e < 0 ? 1  /* f > -1/2 fits in MPFR_RNDN */
+      : mpfr_powerof2_raw(f);  /* -1/2 fits, -1 < f < -1/2 don't */
+
+  /* Now it fits if
+     (a) f <= MAXIMUM
+     (b) round(f, prec(slong), rnd) <= MAXIMUM */
+
   /* first compute prec(MAXIMUM); fits in an int */
   for (s = MAXIMUM, prec = 0; s != 0; s /= 2, prec ++);
 
diff -Naurd mpfr-3.1.2-a/src/fits_uintmax.c mpfr-3.1.2-b/src/fits_uintmax.c
--- mpfr-3.1.2-a/src/fits_uintmax.c	2013-03-13 15:37:33.000000000 +0000
+++ mpfr-3.1.2-b/src/fits_uintmax.c	2013-09-26 10:56:55.000000000 +0000
@@ -27,51 +27,19 @@
 #include "mpfr-intmax.h"
 #include "mpfr-impl.h"
 
-#ifdef _MPFR_H_HAVE_INTMAX_T
-
-/* We can't use fits_u.h <= mpfr_cmp_ui */
-int
-mpfr_fits_uintmax_p (mpfr_srcptr f, mpfr_rnd_t rnd)
-{
-  mpfr_exp_t e;
-  int prec;
-  uintmax_t s;
-  mpfr_t x;
-  int res;
-
-  if (MPFR_UNLIKELY (MPFR_IS_SINGULAR (f)))
-    /* Zero always fit */
-    return MPFR_IS_ZERO (f) ? 1 : 0;
-  else if (MPFR_IS_NEG (f))
-    /* Negative numbers don't fit */
-    return 0;
-  /* now it fits if
-     (a) f <= MAXIMUM
-     (b) round(f, prec(slong), rnd) <= MAXIMUM */
-
-  e = MPFR_GET_EXP (f);
-
-  /* first compute prec(MAXIMUM); fits in an int */
-  for (s = MPFR_UINTMAX_MAX, prec = 0; s != 0; s /= 2, prec ++);
-
-  /* MAXIMUM needs prec bits, i.e. MAXIMUM = 2^prec - 1 */
-
-  /* if e <= prec - 1, then f < 2^(prec-1) < MAXIMUM */
-  if (e <= prec - 1)
-    return 1;
+/* Note: though mpfr-impl.h is included in fits_u.h, we also include it
+   above so that it gets included even when _MPFR_H_HAVE_INTMAX_T is not
+   defined; this is necessary to avoid an empty translation unit, which
+   is forbidden by ISO C. Without this, a failing test can be reproduced
+   by creating an invalid stdint.h somewhere in the default include path
+   and by compiling MPFR with "gcc -ansi -pedantic-errors". */
 
-  /* if e >= prec + 1, then f >= 2^prec > MAXIMUM */
-  if (e >= prec + 1)
-    return 0;
+#ifdef _MPFR_H_HAVE_INTMAX_T
 
-  MPFR_ASSERTD (e == prec);
+#define FUNCTION   mpfr_fits_uintmax_p
+#define MAXIMUM    MPFR_UINTMAX_MAX
+#define TYPE       uintmax_t
 
-  /* hard case: first round to prec bits, then check */
-  mpfr_init2 (x, prec);
-  mpfr_set (x, f, rnd);
-  res = MPFR_GET_EXP (x) == e;
-  mpfr_clear (x);
-  return res;
-}
+#include "fits_u.h"
 
 #endif
diff -Naurd mpfr-3.1.2-a/src/mpfr.h mpfr-3.1.2-b/src/mpfr.h
--- mpfr-3.1.2-a/src/mpfr.h	2013-09-26 10:52:52.000000000 +0000
+++ mpfr-3.1.2-b/src/mpfr.h	2013-09-26 10:56:55.000000000 +0000
@@ -27,7 +27,7 @@
 #define MPFR_VERSION_MAJOR 3
 #define MPFR_VERSION_MINOR 1
 #define MPFR_VERSION_PATCHLEVEL 2
-#define MPFR_VERSION_STRING "3.1.2-p1"
+#define MPFR_VERSION_STRING "3.1.2-p2"
 
 /* Macros dealing with MPFR VERSION */
 #define MPFR_VERSION_NUM(a,b,c) (((a) << 16L) | ((b) << 8) | (c))
diff -Naurd mpfr-3.1.2-a/src/version.c mpfr-3.1.2-b/src/version.c
--- mpfr-3.1.2-a/src/version.c	2013-09-26 10:52:52.000000000 +0000
+++ mpfr-3.1.2-b/src/version.c	2013-09-26 10:56:55.000000000 +0000
@@ -25,5 +25,5 @@
 const char *
 mpfr_get_version (void)
 {
-  return "3.1.2-p1";
+  return "3.1.2-p2";
 }
diff -Naurd mpfr-3.1.2-a/tests/tfits.c mpfr-3.1.2-b/tests/tfits.c
--- mpfr-3.1.2-a/tests/tfits.c	2013-03-13 15:37:45.000000000 +0000
+++ mpfr-3.1.2-b/tests/tfits.c	2013-09-26 10:56:55.000000000 +0000
@@ -33,155 +33,176 @@
 #include "mpfr-intmax.h"
 #include "mpfr-test.h"
 
-#define ERROR1 { printf("Initial error for x="); mpfr_dump(x); exit(1); }
-#define ERROR2 { printf("Error for x="); mpfr_dump(x); exit(1); }
+#define ERROR1(N)                                               \
+  do                                                            \
+    {                                                           \
+      printf("Error %d for rnd = %s and x = ", N,               \
+             mpfr_print_rnd_mode ((mpfr_rnd_t) r));             \
+      mpfr_dump(x);                                             \
+      exit(1);                                                  \
+    }                                                           \
+  while (0)
 
 static void check_intmax (void);
 
 int
 main (void)
 {
-  mpfr_t x;
+  mpfr_t x, y;
+  int i, r;
 
   tests_start_mpfr ();
 
   mpfr_init2 (x, 256);
+  mpfr_init2 (y, 8);
 
-  /* Check NAN */
-  mpfr_set_nan (x);
-  if (mpfr_fits_ulong_p (x, MPFR_RNDN))
-    ERROR1;
-  if (mpfr_fits_slong_p (x, MPFR_RNDN))
-    ERROR1;
-  if (mpfr_fits_uint_p (x, MPFR_RNDN))
-    ERROR1;
-  if (mpfr_fits_sint_p (x, MPFR_RNDN))
-    ERROR1;
-  if (mpfr_fits_ushort_p (x, MPFR_RNDN))
-    ERROR1;
-  if (mpfr_fits_sshort_p (x, MPFR_RNDN))
-    ERROR1;
+  RND_LOOP (r)
+    {
 
-  /* Check INF */
-  mpfr_set_inf (x, 1);
-  if (mpfr_fits_ulong_p (x, MPFR_RNDN))
-    ERROR1;
-  if (mpfr_fits_slong_p (x, MPFR_RNDN))
-    ERROR1;
-  if (mpfr_fits_uint_p (x, MPFR_RNDN))
-    ERROR1;
-  if (mpfr_fits_sint_p (x, MPFR_RNDN))
-    ERROR1;
-  if (mpfr_fits_ushort_p (x, MPFR_RNDN))
-    ERROR1;
-  if (mpfr_fits_sshort_p (x, MPFR_RNDN))
-    ERROR1;
+      /* Check NAN */
+      mpfr_set_nan (x);
+      if (mpfr_fits_ulong_p (x, (mpfr_rnd_t) r))
+        ERROR1 (1);
+      if (mpfr_fits_slong_p (x, (mpfr_rnd_t) r))
+        ERROR1 (2);
+      if (mpfr_fits_uint_p (x, (mpfr_rnd_t) r))
+        ERROR1 (3);
+      if (mpfr_fits_sint_p (x, (mpfr_rnd_t) r))
+        ERROR1 (4);
+      if (mpfr_fits_ushort_p (x, (mpfr_rnd_t) r))
+        ERROR1 (5);
+      if (mpfr_fits_sshort_p (x, (mpfr_rnd_t) r))
+        ERROR1 (6);
 
-  /* Check Zero */
-  MPFR_SET_ZERO (x);
-  if (!mpfr_fits_ulong_p (x, MPFR_RNDN))
-    ERROR2;
-  if (!mpfr_fits_slong_p (x, MPFR_RNDN))
-    ERROR2;
-  if (!mpfr_fits_uint_p (x, MPFR_RNDN))
-    ERROR2;
-  if (!mpfr_fits_sint_p (x, MPFR_RNDN))
-    ERROR2;
-  if (!mpfr_fits_ushort_p (x, MPFR_RNDN))
-    ERROR2;
-  if (!mpfr_fits_sshort_p (x, MPFR_RNDN))
-    ERROR2;
+      /* Check INF */
+      mpfr_set_inf (x, 1);
+      if (mpfr_fits_ulong_p (x, (mpfr_rnd_t) r))
+        ERROR1 (7);
+      if (mpfr_fits_slong_p (x, (mpfr_rnd_t) r))
+        ERROR1 (8);
+      if (mpfr_fits_uint_p (x, (mpfr_rnd_t) r))
+        ERROR1 (9);
+      if (mpfr_fits_sint_p (x, (mpfr_rnd_t) r))
+        ERROR1 (10);
+      if (mpfr_fits_ushort_p (x, (mpfr_rnd_t) r))
+        ERROR1 (11);
+      if (mpfr_fits_sshort_p (x, (mpfr_rnd_t) r))
+        ERROR1 (12);
 
-  /* Check small op */
-  mpfr_set_str1 (x, "1@-1");
-  if (!mpfr_fits_ulong_p (x, MPFR_RNDN))
-    ERROR2;
-  if (!mpfr_fits_slong_p (x, MPFR_RNDN))
-    ERROR2;
-  if (!mpfr_fits_uint_p (x, MPFR_RNDN))
-    ERROR2;
-  if (!mpfr_fits_sint_p (x, MPFR_RNDN))
-    ERROR2;
-  if (!mpfr_fits_ushort_p (x, MPFR_RNDN))
-    ERROR2;
-  if (!mpfr_fits_sshort_p (x, MPFR_RNDN))
-    ERROR2;
+      /* Check Zero */
+      MPFR_SET_ZERO (x);
+      if (!mpfr_fits_ulong_p (x, (mpfr_rnd_t) r))
+        ERROR1 (13);
+      if (!mpfr_fits_slong_p (x, (mpfr_rnd_t) r))
+        ERROR1 (14);
+      if (!mpfr_fits_uint_p (x, (mpfr_rnd_t) r))
+        ERROR1 (15);
+      if (!mpfr_fits_sint_p (x, (mpfr_rnd_t) r))
+        ERROR1 (16);
+      if (!mpfr_fits_ushort_p (x, (mpfr_rnd_t) r))
+        ERROR1 (17);
+      if (!mpfr_fits_sshort_p (x, (mpfr_rnd_t) r))
+        ERROR1 (18);
 
-  /* Check 17 */
-  mpfr_set_ui (x, 17, MPFR_RNDN);
-  if (!mpfr_fits_ulong_p (x, MPFR_RNDN))
-    ERROR2;
-  if (!mpfr_fits_slong_p (x, MPFR_RNDN))
-    ERROR2;
-  if (!mpfr_fits_uint_p (x, MPFR_RNDN))
-    ERROR2;
-  if (!mpfr_fits_sint_p (x, MPFR_RNDN))
-    ERROR2;
-  if (!mpfr_fits_ushort_p (x, MPFR_RNDN))
-    ERROR2;
-  if (!mpfr_fits_sshort_p (x, MPFR_RNDN))
-    ERROR2;
+      /* Check small positive op */
+      mpfr_set_str1 (x, "1@-1");
+      if (!mpfr_fits_ulong_p (x, (mpfr_rnd_t) r))
+        ERROR1 (19);
+      if (!mpfr_fits_slong_p (x, (mpfr_rnd_t) r))
+        ERROR1 (20);
+      if (!mpfr_fits_uint_p (x, (mpfr_rnd_t) r))
+        ERROR1 (21);
+      if (!mpfr_fits_sint_p (x, (mpfr_rnd_t) r))
+        ERROR1 (22);
+      if (!mpfr_fits_ushort_p (x, (mpfr_rnd_t) r))
+        ERROR1 (23);
+      if (!mpfr_fits_sshort_p (x, (mpfr_rnd_t) r))
+        ERROR1 (24);
 
-  /* Check all other values */
-  mpfr_set_ui (x, ULONG_MAX, MPFR_RNDN);
-  mpfr_mul_2exp (x, x, 1, MPFR_RNDN);
-  if (mpfr_fits_ulong_p (x, MPFR_RNDN))
-    ERROR1;
-  if (mpfr_fits_slong_p (x, MPFR_RNDN))
-    ERROR1;
-  mpfr_mul_2exp (x, x, 40, MPFR_RNDN);
-  if (mpfr_fits_ulong_p (x, MPFR_RNDN))
-    ERROR1;
-  if (mpfr_fits_uint_p (x, MPFR_RNDN))
-    ERROR1;
-  if (mpfr_fits_sint_p (x, MPFR_RNDN))
-    ERROR1;
-  if (mpfr_fits_ushort_p (x, MPFR_RNDN))
-    ERROR1;
-  if (mpfr_fits_sshort_p (x, MPFR_RNDN))
-    ERROR1;
+      /* Check 17 */
+      mpfr_set_ui (x, 17, MPFR_RNDN);
+      if (!mpfr_fits_ulong_p (x, (mpfr_rnd_t) r))
+        ERROR1 (25);
+      if (!mpfr_fits_slong_p (x, (mpfr_rnd_t) r))
+        ERROR1 (26);
+      if (!mpfr_fits_uint_p (x, (mpfr_rnd_t) r))
+        ERROR1 (27);
+      if (!mpfr_fits_sint_p (x, (mpfr_rnd_t) r))
+        ERROR1 (28);
+      if (!mpfr_fits_ushort_p (x, (mpfr_rnd_t) r))
+        ERROR1 (29);
+      if (!mpfr_fits_sshort_p (x, (mpfr_rnd_t) r))
+        ERROR1 (30);
 
-  mpfr_set_ui (x, ULONG_MAX, MPFR_RNDN);
-  if (!mpfr_fits_ulong_p (x, MPFR_RNDN))
-    ERROR2;
-  mpfr_set_ui (x, LONG_MAX, MPFR_RNDN);
-  if (!mpfr_fits_slong_p (x, MPFR_RNDN))
-    ERROR2;
-  mpfr_set_ui (x, UINT_MAX, MPFR_RNDN);
-  if (!mpfr_fits_uint_p (x, MPFR_RNDN))
-    ERROR2;
-  mpfr_set_ui (x, INT_MAX, MPFR_RNDN);
-  if (!mpfr_fits_sint_p (x, MPFR_RNDN))
-    ERROR2;
-  mpfr_set_ui (x, USHRT_MAX, MPFR_RNDN);
-  if (!mpfr_fits_ushort_p (x, MPFR_RNDN))
-    ERROR2;
-  mpfr_set_ui (x, SHRT_MAX, MPFR_RNDN);
-  if (!mpfr_fits_sshort_p (x, MPFR_RNDN))
-    ERROR2;
+      /* Check all other values */
+      mpfr_set_ui (x, ULONG_MAX, MPFR_RNDN);
+      mpfr_mul_2exp (x, x, 1, MPFR_RNDN);
+      if (mpfr_fits_ulong_p (x, (mpfr_rnd_t) r))
+        ERROR1 (31);
+      if (mpfr_fits_slong_p (x, (mpfr_rnd_t) r))
+        ERROR1 (32);
+      mpfr_mul_2exp (x, x, 40, MPFR_RNDN);
+      if (mpfr_fits_ulong_p (x, (mpfr_rnd_t) r))
+        ERROR1 (33);
+      if (mpfr_fits_uint_p (x, (mpfr_rnd_t) r))
+        ERROR1 (34);
+      if (mpfr_fits_sint_p (x, (mpfr_rnd_t) r))
+        ERROR1 (35);
+      if (mpfr_fits_ushort_p (x, (mpfr_rnd_t) r))
+        ERROR1 (36);
+      if (mpfr_fits_sshort_p (x, (mpfr_rnd_t) r))
+        ERROR1 (37);
 
-  mpfr_set_si (x, 1, MPFR_RNDN);
-  if (!mpfr_fits_sint_p (x, MPFR_RNDN))
-    ERROR2;
-  if (!mpfr_fits_sshort_p (x, MPFR_RNDN))
-    ERROR2;
+      mpfr_set_ui (x, ULONG_MAX, MPFR_RNDN);
+      if (!mpfr_fits_ulong_p (x, (mpfr_rnd_t) r))
+        ERROR1 (38);
+      mpfr_set_ui (x, LONG_MAX, MPFR_RNDN);
+      if (!mpfr_fits_slong_p (x, (mpfr_rnd_t) r))
+        ERROR1 (39);
+      mpfr_set_ui (x, UINT_MAX, MPFR_RNDN);
+      if (!mpfr_fits_uint_p (x, (mpfr_rnd_t) r))
+        ERROR1 (40);
+      mpfr_set_ui (x, INT_MAX, MPFR_RNDN);
+      if (!mpfr_fits_sint_p (x, (mpfr_rnd_t) r))
+        ERROR1 (41);
+      mpfr_set_ui (x, USHRT_MAX, MPFR_RNDN);
+      if (!mpfr_fits_ushort_p (x, (mpfr_rnd_t) r))
+        ERROR1 (42);
+      mpfr_set_ui (x, SHRT_MAX, MPFR_RNDN);
+      if (!mpfr_fits_sshort_p (x, (mpfr_rnd_t) r))
+        ERROR1 (43);
 
-  /* Check negative value */
-  mpfr_set_si (x, -1, MPFR_RNDN);
-  if (!mpfr_fits_sint_p (x, MPFR_RNDN))
-    ERROR2;
-  if (!mpfr_fits_sshort_p (x, MPFR_RNDN))
-    ERROR2;
-  if (!mpfr_fits_slong_p (x, MPFR_RNDN))
-    ERROR2;
-  if (mpfr_fits_uint_p (x, MPFR_RNDN))
-    ERROR1;
-  if (mpfr_fits_ushort_p (x, MPFR_RNDN))
-    ERROR1;
-  if (mpfr_fits_ulong_p (x, MPFR_RNDN))
-    ERROR1;
+      mpfr_set_si (x, 1, MPFR_RNDN);
+      if (!mpfr_fits_sint_p (x, (mpfr_rnd_t) r))
+        ERROR1 (44);
+      if (!mpfr_fits_sshort_p (x, (mpfr_rnd_t) r))
+        ERROR1 (45);
+
+      /* Check negative op */
+      for (i = 1; i <= 4; i++)
+        {
+          int inv;
+
+          mpfr_set_si_2exp (x, -i, -2, MPFR_RNDN);
+          mpfr_rint (y, x, (mpfr_rnd_t) r);
+          inv = MPFR_NOTZERO (y);
+          if (!mpfr_fits_ulong_p (x, (mpfr_rnd_t) r) ^ inv)
+            ERROR1 (46);
+          if (!mpfr_fits_slong_p (x, (mpfr_rnd_t) r))
+            ERROR1 (47);
+          if (!mpfr_fits_uint_p (x, (mpfr_rnd_t) r) ^ inv)
+            ERROR1 (48);
+          if (!mpfr_fits_sint_p (x, (mpfr_rnd_t) r))
+            ERROR1 (49);
+          if (!mpfr_fits_ushort_p (x, (mpfr_rnd_t) r) ^ inv)
+            ERROR1 (50);
+          if (!mpfr_fits_sshort_p (x, (mpfr_rnd_t) r))
+            ERROR1 (51);
+        }
+    }
 
   mpfr_clear (x);
+  mpfr_clear (y);
 
   check_intmax ();
 
@@ -189,85 +210,98 @@
   return 0;
 }
 
-static void check_intmax (void)
+static void
+check_intmax (void)
 {
 #ifdef _MPFR_H_HAVE_INTMAX_T
-  mpfr_t x;
+  mpfr_t x, y;
+  int i, r;
 
-  mpfr_init2 (x, sizeof (uintmax_t)*CHAR_BIT);
+  mpfr_init2 (x, sizeof (uintmax_t) * CHAR_BIT);
+  mpfr_init2 (y, 8);
 
-  /* Check NAN */
-  mpfr_set_nan (x);
-  if (mpfr_fits_uintmax_p (x, MPFR_RNDN))
-    ERROR1;
-  if (mpfr_fits_intmax_p (x, MPFR_RNDN))
-    ERROR1;
+  RND_LOOP (r)
+    {
+      /* Check NAN */
+      mpfr_set_nan (x);
+      if (mpfr_fits_uintmax_p (x, (mpfr_rnd_t) r))
+        ERROR1 (52);
+      if (mpfr_fits_intmax_p (x, (mpfr_rnd_t) r))
+        ERROR1 (53);
 
-  /* Check INF */
-  mpfr_set_inf (x, 1);
-  if (mpfr_fits_uintmax_p (x, MPFR_RNDN))
-    ERROR1;
-  if (mpfr_fits_intmax_p (x, MPFR_RNDN))
-    ERROR1;
+      /* Check INF */
+      mpfr_set_inf (x, 1);
+      if (mpfr_fits_uintmax_p (x, (mpfr_rnd_t) r))
+        ERROR1 (54);
+      if (mpfr_fits_intmax_p (x, (mpfr_rnd_t) r))
+        ERROR1 (55);
 
-  /* Check Zero */
-  MPFR_SET_ZERO (x);
-  if (!mpfr_fits_uintmax_p (x, MPFR_RNDN))
-    ERROR2;
-  if (!mpfr_fits_intmax_p (x, MPFR_RNDN))
-    ERROR2;
+      /* Check Zero */
+      MPFR_SET_ZERO (x);
+      if (!mpfr_fits_uintmax_p (x, (mpfr_rnd_t) r))
+        ERROR1 (56);
+      if (!mpfr_fits_intmax_p (x, (mpfr_rnd_t) r))
+        ERROR1 (57);
 
-  /* Check small op */
-  mpfr_set_str1 (x, "1@-1");
-  if (!mpfr_fits_uintmax_p (x, MPFR_RNDN))
-    ERROR2;
-  if (!mpfr_fits_intmax_p (x, MPFR_RNDN))
-    ERROR2;
+      /* Check positive small op */
+      mpfr_set_str1 (x, "1@-1");
+      if (!mpfr_fits_uintmax_p (x, (mpfr_rnd_t) r))
+        ERROR1 (58);
+      if (!mpfr_fits_intmax_p (x, (mpfr_rnd_t) r))
+        ERROR1 (59);
 
-  /* Check 17 */
-  mpfr_set_ui (x, 17, MPFR_RNDN);
-  if (!mpfr_fits_uintmax_p (x, MPFR_RNDN))
-    ERROR2;
-  if (!mpfr_fits_intmax_p (x, MPFR_RNDN))
-    ERROR2;
+      /* Check 17 */
+      mpfr_set_ui (x, 17, MPFR_RNDN);
+      if (!mpfr_fits_uintmax_p (x, (mpfr_rnd_t) r))
+        ERROR1 (60);
+      if (!mpfr_fits_intmax_p (x, (mpfr_rnd_t) r))
+        ERROR1 (61);
 
-  /* Check hugest */
-  mpfr_set_ui_2exp (x, 42, sizeof (uintmax_t) * 32, MPFR_RNDN);
-  if (mpfr_fits_uintmax_p (x, MPFR_RNDN))
-    ERROR1;
-  if (mpfr_fits_intmax_p (x, MPFR_RNDN))
-    ERROR1;
+      /* Check hugest */
+      mpfr_set_ui_2exp (x, 42, sizeof (uintmax_t) * 32, MPFR_RNDN);
+      if (mpfr_fits_uintmax_p (x, (mpfr_rnd_t) r))
+        ERROR1 (62);
+      if (mpfr_fits_intmax_p (x, (mpfr_rnd_t) r))
+        ERROR1 (63);
 
-  /* Check all other values */
-  mpfr_set_uj (x, MPFR_UINTMAX_MAX, MPFR_RNDN);
-  mpfr_add_ui (x, x, 1, MPFR_RNDN);
-  if (mpfr_fits_uintmax_p (x, MPFR_RNDN))
-    ERROR1;
-  mpfr_set_uj (x, MPFR_UINTMAX_MAX, MPFR_RNDN);
-  if (!mpfr_fits_uintmax_p (x, MPFR_RNDN))
-    ERROR2;
-  mpfr_set_sj (x, MPFR_INTMAX_MAX, MPFR_RNDN);
-  mpfr_add_ui (x, x, 1, MPFR_RNDN);
-  if (mpfr_fits_intmax_p (x, MPFR_RNDN))
-    ERROR1;
-  mpfr_set_sj (x, MPFR_INTMAX_MAX, MPFR_RNDN);
-  if (!mpfr_fits_intmax_p (x, MPFR_RNDN))
-    ERROR2;
-  mpfr_set_sj (x, MPFR_INTMAX_MIN, MPFR_RNDN);
-  if (!mpfr_fits_intmax_p (x, MPFR_RNDN))
-    ERROR2;
-  mpfr_sub_ui (x, x, 1, MPFR_RNDN);
-  if (mpfr_fits_intmax_p (x, MPFR_RNDN))
-    ERROR1;
+      /* Check all other values */
+      mpfr_set_uj (x, MPFR_UINTMAX_MAX, MPFR_RNDN);
+      mpfr_add_ui (x, x, 1, MPFR_RNDN);
+      if (mpfr_fits_uintmax_p (x, (mpfr_rnd_t) r))
+        ERROR1 (64);
+      mpfr_set_uj (x, MPFR_UINTMAX_MAX, MPFR_RNDN);
+      if (!mpfr_fits_uintmax_p (x, (mpfr_rnd_t) r))
+        ERROR1 (65);
+      mpfr_set_sj (x, MPFR_INTMAX_MAX, MPFR_RNDN);
+      mpfr_add_ui (x, x, 1, MPFR_RNDN);
+      if (mpfr_fits_intmax_p (x, (mpfr_rnd_t) r))
+        ERROR1 (66);
+      mpfr_set_sj (x, MPFR_INTMAX_MAX, MPFR_RNDN);
+      if (!mpfr_fits_intmax_p (x, (mpfr_rnd_t) r))
+        ERROR1 (67);
+      mpfr_set_sj (x, MPFR_INTMAX_MIN, MPFR_RNDN);
+      if (!mpfr_fits_intmax_p (x, (mpfr_rnd_t) r))
+        ERROR1 (68);
+      mpfr_sub_ui (x, x, 1, MPFR_RNDN);
+      if (mpfr_fits_intmax_p (x, (mpfr_rnd_t) r))
+        ERROR1 (69);
 
-  /* Check negative value */
-  mpfr_set_si (x, -1, MPFR_RNDN);
-  if (!mpfr_fits_intmax_p (x, MPFR_RNDN))
-    ERROR2;
-  if (mpfr_fits_uintmax_p (x, MPFR_RNDN))
-    ERROR1;
+      /* Check negative op */
+      for (i = 1; i <= 4; i++)
+        {
+          int inv;
+
+          mpfr_set_si_2exp (x, -i, -2, MPFR_RNDN);
+          mpfr_rint (y, x, (mpfr_rnd_t) r);
+          inv = MPFR_NOTZERO (y);
+          if (!mpfr_fits_uintmax_p (x, (mpfr_rnd_t) r) ^ inv)
+            ERROR1 (70);
+          if (!mpfr_fits_intmax_p (x, (mpfr_rnd_t) r))
+            ERROR1 (71);
+        }
+    }
 
   mpfr_clear (x);
+  mpfr_clear (y);
 #endif
 }
-
diff -Naurd mpfr-3.1.2-a/PATCHES mpfr-3.1.2-b/PATCHES
--- mpfr-3.1.2-a/PATCHES	2013-10-09 13:34:21.000000000 +0000
+++ mpfr-3.1.2-b/PATCHES	2013-10-09 13:34:21.000000000 +0000
@@ -0,0 +1 @@
+clang-divby0
diff -Naurd mpfr-3.1.2-a/VERSION mpfr-3.1.2-b/VERSION
--- mpfr-3.1.2-a/VERSION	2013-09-26 10:52:52.000000000 +0000
+++ mpfr-3.1.2-b/VERSION	2013-10-09 13:34:21.000000000 +0000
@@ -1 +1 @@
-3.1.2-p2
+3.1.2-p3
diff -Naurd mpfr-3.1.2-a/src/mpfr-impl.h mpfr-3.1.2-b/src/mpfr-impl.h
--- mpfr-3.1.2-a/src/mpfr-impl.h	2013-03-13 15:37:36.000000000 +0000
+++ mpfr-3.1.2-b/src/mpfr-impl.h	2013-10-09 13:34:21.000000000 +0000
@@ -468,8 +468,16 @@
 #define MPFR_LIMBS_PER_FLT ((IEEE_FLT_MANT_DIG-1)/GMP_NUMB_BITS+1)
 
 /* Visual C++ doesn't support +1.0/0.0, -1.0/0.0 and 0.0/0.0
-   at compile time. */
-#if defined(_MSC_VER) && defined(_WIN32) && (_MSC_VER >= 1200)
+   at compile time.
+   Clang with -fsanitize=undefined is a bit similar due to a bug:
+     http://llvm.org/bugs/show_bug.cgi?id=17381
+   but even without its sanitizer, it may be better to use the
+   double_zero version until IEEE 754 division by zero is properly
+   supported:
+     http://llvm.org/bugs/show_bug.cgi?id=17000
+*/
+#if (defined(_MSC_VER) && defined(_WIN32) && (_MSC_VER >= 1200)) || \
+    defined(__clang__)
 static double double_zero = 0.0;
 # define DBL_NAN (double_zero/double_zero)
 # define DBL_POS_INF ((double) 1.0/double_zero)
@@ -501,6 +509,8 @@
    (with Xcode 2.4.1, i.e. the latest one). */
 #define LVALUE(x) (&(x) == &(x) || &(x) != &(x))
 #define DOUBLE_ISINF(x) (LVALUE(x) && ((x) > DBL_MAX || (x) < -DBL_MAX))
+/* The DOUBLE_ISNAN(x) macro is also valid on long double x
+   (assuming that the compiler isn't too broken). */
 #ifdef MPFR_NANISNAN
 /* Avoid MIPSpro / IRIX64 / gcc -ffast-math (incorrect) optimizations.
    The + must not be replaced by a ||. With gcc -ffast-math, NaN is
diff -Naurd mpfr-3.1.2-a/src/mpfr.h mpfr-3.1.2-b/src/mpfr.h
--- mpfr-3.1.2-a/src/mpfr.h	2013-09-26 10:52:52.000000000 +0000
+++ mpfr-3.1.2-b/src/mpfr.h	2013-10-09 13:34:21.000000000 +0000
@@ -27,7 +27,7 @@
 #define MPFR_VERSION_MAJOR 3
 #define MPFR_VERSION_MINOR 1
 #define MPFR_VERSION_PATCHLEVEL 2
-#define MPFR_VERSION_STRING "3.1.2-p2"
+#define MPFR_VERSION_STRING "3.1.2-p3"
 
 /* Macros dealing with MPFR VERSION */
 #define MPFR_VERSION_NUM(a,b,c) (((a) << 16L) | ((b) << 8) | (c))
diff -Naurd mpfr-3.1.2-a/src/version.c mpfr-3.1.2-b/src/version.c
--- mpfr-3.1.2-a/src/version.c	2013-09-26 10:52:52.000000000 +0000
+++ mpfr-3.1.2-b/src/version.c	2013-10-09 13:34:21.000000000 +0000
@@ -25,5 +25,5 @@
 const char *
 mpfr_get_version (void)
 {
-  return "3.1.2-p2";
+  return "3.1.2-p3";
 }
diff -Naurd mpfr-3.1.2-a/tests/tget_flt.c mpfr-3.1.2-b/tests/tget_flt.c
--- mpfr-3.1.2-a/tests/tget_flt.c	2013-03-13 15:37:44.000000000 +0000
+++ mpfr-3.1.2-b/tests/tget_flt.c	2013-10-09 13:34:21.000000000 +0000
@@ -28,9 +28,17 @@
 main (void)
 {
   mpfr_t x, y;
-  float f, g, infp;
+  float f, g;
   int i;
+#if !defined(MPFR_ERRDIVZERO)
+  float infp;
+#endif
+
+  tests_start_mpfr ();
 
+#if !defined(MPFR_ERRDIVZERO)
+  /* The definition of DBL_POS_INF involves a division by 0. This makes
+     "clang -O2 -fsanitize=undefined -fno-sanitize-recover" fail. */
   infp = (float) DBL_POS_INF;
   if (infp * 0.5 != infp)
     {
@@ -38,8 +46,7 @@
       fprintf (stderr, "(this is probably a compiler bug, please report)\n");
       exit (1);
     }
-
-  tests_start_mpfr ();
+#endif
 
   mpfr_init2 (x, 24);
   mpfr_init2 (y, 24);
@@ -353,6 +360,7 @@
       printf ("expected %.8e, got %.8e\n", g, f);
       exit (1);
     }
+#if !defined(MPFR_ERRDIVZERO)
   f = mpfr_get_flt (x, MPFR_RNDN); /* first round to 2^128 (even rule),
                                       thus we should get +Inf */
   g = infp;
@@ -376,6 +384,7 @@
       printf ("expected %.8e, got %.8e\n", g, f);
       exit (1);
     }
+#endif
 
   mpfr_clear (x);
   mpfr_clear (y);
diff -Naurd mpfr-3.1.2-a/tests/tset_ld.c mpfr-3.1.2-b/tests/tset_ld.c
--- mpfr-3.1.2-a/tests/tset_ld.c	2013-03-13 15:37:44.000000000 +0000
+++ mpfr-3.1.2-b/tests/tset_ld.c	2013-10-09 13:34:21.000000000 +0000
@@ -47,8 +47,11 @@
 static int
 Isnan_ld (long double d)
 {
-  double e = (double) d;
-  if (DOUBLE_ISNAN (e))
+  /* Do not convert d to double as this can give an overflow, which
+     may confuse compilers without IEEE 754 support (such as clang
+     -fsanitize=undefined), or trigger a trap if enabled.
+     The DOUBLE_ISNAN macro should work fine on long double. */
+  if (DOUBLE_ISNAN (d))
     return 1;
   LONGDOUBLE_NAN_ACTION (d, goto yes);
   return 0;
diff -Naurd mpfr-3.1.2-a/PATCHES mpfr-3.1.2-b/PATCHES
--- mpfr-3.1.2-a/PATCHES	2013-11-15 00:51:49.211333830 +0000
+++ mpfr-3.1.2-b/PATCHES	2013-11-15 00:51:49.323334999 +0000
@@ -0,0 +1 @@
+printf-alt0
diff -Naurd mpfr-3.1.2-a/VERSION mpfr-3.1.2-b/VERSION
--- mpfr-3.1.2-a/VERSION	2013-11-15 00:51:49.211333830 +0000
+++ mpfr-3.1.2-b/VERSION	2013-11-15 00:51:49.323334999 +0000
@@ -1 +1 @@
-3.1.2-p3
+3.1.2-p4
diff -Naurd mpfr-3.1.2-a/src/mpfr.h mpfr-3.1.2-b/src/mpfr.h
--- mpfr-3.1.2-a/src/mpfr.h	2013-11-15 00:51:49.211333830 +0000
+++ mpfr-3.1.2-b/src/mpfr.h	2013-11-15 00:51:49.323334999 +0000
@@ -27,7 +27,7 @@
 #define MPFR_VERSION_MAJOR 3
 #define MPFR_VERSION_MINOR 1
 #define MPFR_VERSION_PATCHLEVEL 2
-#define MPFR_VERSION_STRING "3.1.2-p3"
+#define MPFR_VERSION_STRING "3.1.2-p4"
 
 /* Macros dealing with MPFR VERSION */
 #define MPFR_VERSION_NUM(a,b,c) (((a) << 16L) | ((b) << 8) | (c))
diff -Naurd mpfr-3.1.2-a/src/vasprintf.c mpfr-3.1.2-b/src/vasprintf.c
--- mpfr-3.1.2-a/src/vasprintf.c	2013-03-13 15:37:37.000000000 +0000
+++ mpfr-3.1.2-b/src/vasprintf.c	2013-11-15 00:51:49.267334408 +0000
@@ -1040,7 +1040,7 @@
 }
 
 /* Determine the different parts of the string representation of the regular
-   number P when SPEC.SPEC is 'e', 'E', 'g', or 'G'.
+   number P when spec.spec is 'e', 'E', 'g', or 'G'.
    DEC_INFO contains the previously computed exponent and string or is NULL.
 
    return -1 if some field > INT_MAX */
@@ -1167,7 +1167,7 @@
 }
 
 /* Determine the different parts of the string representation of the regular
-   number P when SPEC.SPEC is 'f', 'F', 'g', or 'G'.
+   number P when spec.spec is 'f', 'F', 'g', or 'G'.
    DEC_INFO contains the previously computed exponent and string or is NULL.
 
    return -1 if some field of number_parts is greater than INT_MAX */
@@ -1559,7 +1559,7 @@
             /* fractional part */
             {
               np->point = MPFR_DECIMAL_POINT;
-              np->fp_trailing_zeros = (spec.spec == 'g' && spec.spec == 'G') ?
+              np->fp_trailing_zeros = (spec.spec == 'g' || spec.spec == 'G') ?
                 spec.prec - 1 : spec.prec;
             }
           else if (spec.alt)
diff -Naurd mpfr-3.1.2-a/src/version.c mpfr-3.1.2-b/src/version.c
--- mpfr-3.1.2-a/src/version.c	2013-11-15 00:51:49.211333830 +0000
+++ mpfr-3.1.2-b/src/version.c	2013-11-15 00:51:49.323334999 +0000
@@ -25,5 +25,5 @@
 const char *
 mpfr_get_version (void)
 {
-  return "3.1.2-p3";
+  return "3.1.2-p4";
 }
diff -Naurd mpfr-3.1.2-a/tests/tsprintf.c mpfr-3.1.2-b/tests/tsprintf.c
--- mpfr-3.1.2-a/tests/tsprintf.c	2013-03-13 15:37:44.000000000 +0000
+++ mpfr-3.1.2-b/tests/tsprintf.c	2013-11-15 00:51:49.267334408 +0000
@@ -456,10 +456,16 @@
   check_sprintf ("1.999900  ", "%-#10.7RG", x);
   check_sprintf ("1.9999    ", "%-10.7RG", x);
   mpfr_set_ui (x, 1, MPFR_RNDN);
+  check_sprintf ("1.", "%#.1Rg", x);
+  check_sprintf ("1.   ", "%-#5.1Rg", x);
+  check_sprintf ("  1.0", "%#5.2Rg", x);
   check_sprintf ("1.00000000000000000000000000000", "%#.30Rg", x);
   check_sprintf ("1", "%.30Rg", x);
   mpfr_set_ui (x, 0, MPFR_RNDN);
-  check_sprintf ("0.000000000000000000000000000000", "%#.30Rg", x);
+  check_sprintf ("0.", "%#.1Rg", x);
+  check_sprintf ("0.   ", "%-#5.1Rg", x);
+  check_sprintf ("  0.0", "%#5.2Rg", x);
+  check_sprintf ("0.00000000000000000000000000000", "%#.30Rg", x);
   check_sprintf ("0", "%.30Rg", x);
 
   /* following tests with precision 53 bits */
diff -Naurd mpfr-3.1.2-a/PATCHES mpfr-3.1.2-b/PATCHES
--- mpfr-3.1.2-a/PATCHES	2013-12-01 11:07:49.575329762 +0000
+++ mpfr-3.1.2-b/PATCHES	2013-12-01 11:07:49.751331625 +0000
@@ -0,0 +1 @@
+custom_init_set
diff -Naurd mpfr-3.1.2-a/VERSION mpfr-3.1.2-b/VERSION
--- mpfr-3.1.2-a/VERSION	2013-12-01 11:07:49.571329714 +0000
+++ mpfr-3.1.2-b/VERSION	2013-12-01 11:07:49.747331585 +0000
@@ -1 +1 @@
-3.1.2-p4
+3.1.2-p5
diff -Naurd mpfr-3.1.2-a/src/mpfr.h mpfr-3.1.2-b/src/mpfr.h
--- mpfr-3.1.2-a/src/mpfr.h	2013-12-01 11:07:49.571329714 +0000
+++ mpfr-3.1.2-b/src/mpfr.h	2013-12-01 11:07:49.747331585 +0000
@@ -27,7 +27,7 @@
 #define MPFR_VERSION_MAJOR 3
 #define MPFR_VERSION_MINOR 1
 #define MPFR_VERSION_PATCHLEVEL 2
-#define MPFR_VERSION_STRING "3.1.2-p4"
+#define MPFR_VERSION_STRING "3.1.2-p5"
 
 /* Macros dealing with MPFR VERSION */
 #define MPFR_VERSION_NUM(a,b,c) (((a) << 16L) | ((b) << 8) | (c))
@@ -861,7 +861,7 @@
     _t = (mpfr_kind_t) _k;                                     \
     _s = 1;                                                    \
   } else {                                                     \
-    _t = (mpfr_kind_t) -k;                                     \
+    _t = (mpfr_kind_t) - _k;                                   \
     _s = -1;                                                   \
   }                                                            \
   _e = _t == MPFR_REGULAR_KIND ? (e) :                         \
diff -Naurd mpfr-3.1.2-a/src/version.c mpfr-3.1.2-b/src/version.c
--- mpfr-3.1.2-a/src/version.c	2013-12-01 11:07:49.575329762 +0000
+++ mpfr-3.1.2-b/src/version.c	2013-12-01 11:07:49.747331585 +0000
@@ -25,5 +25,5 @@
 const char *
 mpfr_get_version (void)
 {
-  return "3.1.2-p4";
+  return "3.1.2-p5";
 }
diff -Naurd mpfr-3.1.2-a/PATCHES mpfr-3.1.2-b/PATCHES
--- mpfr-3.1.2-a/PATCHES	2014-04-15 21:56:49.609057464 +0000
+++ mpfr-3.1.2-b/PATCHES	2014-04-15 21:56:49.697059857 +0000
@@ -0,0 +1 @@
+li2-return
diff -Naurd mpfr-3.1.2-a/VERSION mpfr-3.1.2-b/VERSION
--- mpfr-3.1.2-a/VERSION	2014-04-15 21:56:49.609057464 +0000
+++ mpfr-3.1.2-b/VERSION	2014-04-15 21:56:49.697059857 +0000
@@ -1 +1 @@
-3.1.2-p5
+3.1.2-p6
diff -Naurd mpfr-3.1.2-a/src/li2.c mpfr-3.1.2-b/src/li2.c
--- mpfr-3.1.2-a/src/li2.c	2013-03-13 15:37:32.000000000 +0000
+++ mpfr-3.1.2-b/src/li2.c	2014-04-15 21:56:49.653058661 +0000
@@ -630,5 +630,5 @@
       return mpfr_check_range (y, inexact, rnd_mode);
     }
 
-  MPFR_ASSERTN (0);             /* should never reach this point */
+  MPFR_RET_NEVER_GO_HERE ();
 }
diff -Naurd mpfr-3.1.2-a/src/mpfr.h mpfr-3.1.2-b/src/mpfr.h
--- mpfr-3.1.2-a/src/mpfr.h	2014-04-15 21:56:49.609057464 +0000
+++ mpfr-3.1.2-b/src/mpfr.h	2014-04-15 21:56:49.697059857 +0000
@@ -27,7 +27,7 @@
 #define MPFR_VERSION_MAJOR 3
 #define MPFR_VERSION_MINOR 1
 #define MPFR_VERSION_PATCHLEVEL 2
-#define MPFR_VERSION_STRING "3.1.2-p5"
+#define MPFR_VERSION_STRING "3.1.2-p6"
 
 /* Macros dealing with MPFR VERSION */
 #define MPFR_VERSION_NUM(a,b,c) (((a) << 16L) | ((b) << 8) | (c))
diff -Naurd mpfr-3.1.2-a/src/version.c mpfr-3.1.2-b/src/version.c
--- mpfr-3.1.2-a/src/version.c	2014-04-15 21:56:49.609057464 +0000
+++ mpfr-3.1.2-b/src/version.c	2014-04-15 21:56:49.697059857 +0000
@@ -25,5 +25,5 @@
 const char *
 mpfr_get_version (void)
 {
-  return "3.1.2-p5";
+  return "3.1.2-p6";
 }
diff -Naurd mpfr-3.1.2-a/PATCHES mpfr-3.1.2-b/PATCHES
--- mpfr-3.1.2-a/PATCHES	2014-04-15 22:04:57.090286262 +0000
+++ mpfr-3.1.2-b/PATCHES	2014-04-15 22:04:57.162288198 +0000
@@ -0,0 +1 @@
+exp3
diff -Naurd mpfr-3.1.2-a/VERSION mpfr-3.1.2-b/VERSION
--- mpfr-3.1.2-a/VERSION	2014-04-15 22:04:57.086286154 +0000
+++ mpfr-3.1.2-b/VERSION	2014-04-15 22:04:57.162288198 +0000
@@ -1 +1 @@
-3.1.2-p6
+3.1.2-p7
diff -Naurd mpfr-3.1.2-a/src/exp3.c mpfr-3.1.2-b/src/exp3.c
--- mpfr-3.1.2-a/src/exp3.c	2013-03-13 15:37:34.000000000 +0000
+++ mpfr-3.1.2-b/src/exp3.c	2014-04-15 22:04:57.126287230 +0000
@@ -283,7 +283,7 @@
             }
         }
 
-      if (mpfr_can_round (shift_x > 0 ? t : tmp, realprec, MPFR_RNDD, MPFR_RNDZ,
+      if (mpfr_can_round (shift_x > 0 ? t : tmp, realprec, MPFR_RNDN, MPFR_RNDZ,
                           MPFR_PREC(y) + (rnd_mode == MPFR_RNDN)))
         {
           inexact = mpfr_set (y, shift_x > 0 ? t : tmp, rnd_mode);
diff -Naurd mpfr-3.1.2-a/src/mpfr.h mpfr-3.1.2-b/src/mpfr.h
--- mpfr-3.1.2-a/src/mpfr.h	2014-04-15 22:04:57.086286154 +0000
+++ mpfr-3.1.2-b/src/mpfr.h	2014-04-15 22:04:57.162288198 +0000
@@ -27,7 +27,7 @@
 #define MPFR_VERSION_MAJOR 3
 #define MPFR_VERSION_MINOR 1
 #define MPFR_VERSION_PATCHLEVEL 2
-#define MPFR_VERSION_STRING "3.1.2-p6"
+#define MPFR_VERSION_STRING "3.1.2-p7"
 
 /* Macros dealing with MPFR VERSION */
 #define MPFR_VERSION_NUM(a,b,c) (((a) << 16L) | ((b) << 8) | (c))
diff -Naurd mpfr-3.1.2-a/src/version.c mpfr-3.1.2-b/src/version.c
--- mpfr-3.1.2-a/src/version.c	2014-04-15 22:04:57.090286262 +0000
+++ mpfr-3.1.2-b/src/version.c	2014-04-15 22:04:57.162288198 +0000
@@ -25,5 +25,5 @@
 const char *
 mpfr_get_version (void)
 {
-  return "3.1.2-p6";
+  return "3.1.2-p7";
 }
diff -Naurd mpfr-3.1.2-a/tests/texp.c mpfr-3.1.2-b/tests/texp.c
--- mpfr-3.1.2-a/tests/texp.c	2013-03-13 15:37:44.000000000 +0000
+++ mpfr-3.1.2-b/tests/texp.c	2014-04-15 22:04:57.126287230 +0000
@@ -150,6 +150,22 @@
       exit (1);
     }
 
+  mpfr_set_prec (x, 118);
+  mpfr_set_str_binary (x, "0.1110010100011101010000111110011000000000000000000000000000000000000000000000000000000000000000000000000000000000000000E-86");
+  mpfr_set_prec (y, 118);
+  mpfr_exp_2 (y, x, MPFR_RNDU);
+  mpfr_exp_3 (x, x, MPFR_RNDU);
+  if (mpfr_cmp (x, y))
+    {
+      printf ("mpfr_exp_2 and mpfr_exp_3 differ for prec=118\n");
+      printf ("mpfr_exp_2 gives ");
+      mpfr_out_str (stdout, 2, 0, y, MPFR_RNDN);
+      printf ("\nmpfr_exp_3 gives ");
+      mpfr_out_str (stdout, 2, 0, x, MPFR_RNDN);
+      printf ("\n");
+      exit (1);
+    }
+
   mpfr_clear (x);
   mpfr_clear (y);
   return 0;
diff -Naurd mpfr-3.1.2-a/PATCHES mpfr-3.1.2-b/PATCHES
--- mpfr-3.1.2-a/PATCHES	2014-04-15 22:20:32.243481506 +0000
+++ mpfr-3.1.2-b/PATCHES	2014-04-15 22:22:32.418722707 +0000
@@ -0,0 +1 @@
+gmp6-compat
diff -Naurd mpfr-3.1.2-a/VERSION mpfr-3.1.2-b/VERSION
--- mpfr-3.1.2-a/VERSION	2014-04-15 22:20:20.755171478 +0000
+++ mpfr-3.1.2-b/VERSION	2014-04-15 22:21:45.225450147 +0000
@@ -1 +1 @@
-3.1.2-p7
+3.1.2-p8
diff -Naurd mpfr-3.1.2-a/configure mpfr-3.1.2-b/configure
--- mpfr-3.1.2-a/configure	2013-03-13 15:38:20.000000000 +0000
+++ mpfr-3.1.2-b/configure	2014-04-15 22:21:38.821277476 +0000
@@ -14545,26 +14545,30 @@
 rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
 fi
 
-if test "$use_gmp_build" = yes ; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for valid GMP_NUMB_BITS" >&5
-$as_echo_n "checking for valid GMP_NUMB_BITS... " >&6; }
-  if test "$cross_compiling" = yes; then :
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for GMP_NUMB_BITS and sizeof(mp_limb_t) consistency" >&5
+$as_echo_n "checking for GMP_NUMB_BITS and sizeof(mp_limb_t) consistency... " >&6; }
+if test "$cross_compiling" = yes; then :
   { $as_echo "$as_me:${as_lineno-$LINENO}: result: can't test" >&5
 $as_echo "can't test" >&6; }
 else
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
+#include <stdio.h>
 #include <limits.h>
 #include "gmp.h"
-#include "gmp-impl.h"
 
 int
 main ()
 {
 
-  return GMP_NUMB_BITS == BYTES_PER_MP_LIMB * CHAR_BIT
-         && sizeof(mp_limb_t) == BYTES_PER_MP_LIMB ? 0 : 1;
+  if (GMP_NUMB_BITS == sizeof(mp_limb_t) * CHAR_BIT)
+    return 0;
+  fprintf (stderr, "GMP_NUMB_BITS     = %ld\n", (long) GMP_NUMB_BITS);
+  fprintf (stderr, "sizeof(mp_limb_t) = %ld\n", (long) sizeof(mp_limb_t));
+  fprintf (stderr, "sizeof(mp_limb_t) * CHAR_BIT = %ld != GMP_NUMB_BITS\n",
+           (long) (sizeof(mp_limb_t) * CHAR_BIT));
+  return 1;
 
   ;
   return 0;
@@ -14577,14 +14581,14 @@
 
        { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
 $as_echo "no" >&6; }
-       as_fn_error $? "GMP_NUMB_BITS is incorrect.
-You probably need to change some of the GMP or MPFR compile options." "$LINENO" 5
+       as_fn_error $? "GMP_NUMB_BITS and sizeof(mp_limb_t) are not consistent.
+You probably need to change some of the GMP or MPFR compile options.
+See 'config.log' for details (search for GMP_NUMB_BITS)." "$LINENO" 5
 fi
 rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
   conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
 
-fi
 
 
 if test "$dont_link_with_gmp" = yes ; then
diff -Naurd mpfr-3.1.2-a/configure.ac mpfr-3.1.2-b/configure.ac
--- mpfr-3.1.2-a/configure.ac	2013-03-13 15:37:46.000000000 +0000
+++ mpfr-3.1.2-b/configure.ac	2013-03-13 15:37:46.000000000 +0000
@@ -435,23 +435,29 @@
    ])
 fi
 
-dnl Check for valid GMP_NUMB_BITS and BYTES_PER_MP_LIMB
+dnl Check for GMP_NUMB_BITS and sizeof(mp_limb_t) consistency.
+dnl Problems may occur if gmp.h was generated with some ABI
+dnl and is used with another ABI (or if nails are used).
 dnl This test doesn't need to link with libgmp (at least it shouldn't).
-if test "$use_gmp_build" = yes ; then
-  AC_MSG_CHECKING(for valid GMP_NUMB_BITS)
-  AC_RUN_IFELSE([AC_LANG_PROGRAM([[
+AC_MSG_CHECKING(for GMP_NUMB_BITS and sizeof(mp_limb_t) consistency)
+AC_RUN_IFELSE([AC_LANG_PROGRAM([[
+#include <stdio.h>
 #include <limits.h>
 #include "gmp.h"
-#include "gmp-impl.h"
 ]], [[
-  return GMP_NUMB_BITS == BYTES_PER_MP_LIMB * CHAR_BIT
-         && sizeof(mp_limb_t) == BYTES_PER_MP_LIMB ? 0 : 1;
+  if (GMP_NUMB_BITS == sizeof(mp_limb_t) * CHAR_BIT)
+    return 0;
+  fprintf (stderr, "GMP_NUMB_BITS     = %ld\n", (long) GMP_NUMB_BITS);
+  fprintf (stderr, "sizeof(mp_limb_t) = %ld\n", (long) sizeof(mp_limb_t));
+  fprintf (stderr, "sizeof(mp_limb_t) * CHAR_BIT = %ld != GMP_NUMB_BITS\n",
+           (long) (sizeof(mp_limb_t) * CHAR_BIT));
+  return 1;
 ]])], [AC_MSG_RESULT(yes)], [
        AC_MSG_RESULT(no)
-       AC_MSG_ERROR([GMP_NUMB_BITS is incorrect.
-You probably need to change some of the GMP or MPFR compile options.])],
+       AC_MSG_ERROR([GMP_NUMB_BITS and sizeof(mp_limb_t) are not consistent.
+You probably need to change some of the GMP or MPFR compile options.
+See 'config.log' for details (search for GMP_NUMB_BITS).])],
        [AC_MSG_RESULT([can't test])])
-fi
 
 
 dnl We really need to link using libtool. But it is impossible with the current
diff -Naurd mpfr-3.1.2-a/src/init2.c mpfr-3.1.2-b/src/init2.c
--- mpfr-3.1.2-a/src/init2.c	2013-03-13 15:37:32.000000000 +0000
+++ mpfr-3.1.2-b/src/init2.c	2014-04-15 22:21:06.220398489 +0000
@@ -30,11 +30,11 @@
 
   /* Check if we can represent the number of limbs
    * associated to the maximum of mpfr_prec_t*/
-  MPFR_ASSERTN( MP_SIZE_T_MAX >= (MPFR_PREC_MAX/BYTES_PER_MP_LIMB) );
+  MPFR_ASSERTN( MP_SIZE_T_MAX >= (MPFR_PREC_MAX/MPFR_BYTES_PER_MP_LIMB) );
 
-  /* Check for correct GMP_NUMB_BITS and BYTES_PER_MP_LIMB */
-  MPFR_ASSERTN( GMP_NUMB_BITS == BYTES_PER_MP_LIMB * CHAR_BIT
-                && sizeof(mp_limb_t) == BYTES_PER_MP_LIMB );
+  /* Check for correct GMP_NUMB_BITS and MPFR_BYTES_PER_MP_LIMB */
+  MPFR_ASSERTN( GMP_NUMB_BITS == MPFR_BYTES_PER_MP_LIMB * CHAR_BIT
+                && sizeof(mp_limb_t) == MPFR_BYTES_PER_MP_LIMB );
 
   MPFR_ASSERTN (mp_bits_per_limb == GMP_NUMB_BITS);
 
diff -Naurd mpfr-3.1.2-a/src/mpfr-gmp.h mpfr-3.1.2-b/src/mpfr-gmp.h
--- mpfr-3.1.2-a/src/mpfr-gmp.h	2013-03-13 15:37:32.000000000 +0000
+++ mpfr-3.1.2-b/src/mpfr-gmp.h	2014-04-15 22:21:06.220398489 +0000
@@ -72,7 +72,6 @@
 #endif
 
 /* Define some macros */
-#define BYTES_PER_MP_LIMB (GMP_NUMB_BITS/CHAR_BIT)
 
 #define MP_LIMB_T_MAX (~(mp_limb_t)0)
 
@@ -96,19 +95,19 @@
 #define SHRT_HIGHBIT       SHRT_MIN
 
 /* MP_LIMB macros */
-#define MPN_ZERO(dst, n) memset((dst), 0, (n)*BYTES_PER_MP_LIMB)
-#define MPN_COPY_DECR(dst,src,n) memmove((dst),(src),(n)*BYTES_PER_MP_LIMB)
-#define MPN_COPY_INCR(dst,src,n) memmove((dst),(src),(n)*BYTES_PER_MP_LIMB)
+#define MPN_ZERO(dst, n) memset((dst), 0, (n)*MPFR_BYTES_PER_MP_LIMB)
+#define MPN_COPY_DECR(dst,src,n) memmove((dst),(src),(n)*MPFR_BYTES_PER_MP_LIMB)
+#define MPN_COPY_INCR(dst,src,n) memmove((dst),(src),(n)*MPFR_BYTES_PER_MP_LIMB)
 #define MPN_COPY(dst,src,n) \
   do                                                                  \
     {                                                                 \
       if ((dst) != (src))                                             \
         {                                                             \
           MPFR_ASSERTD ((char *) (dst) >= (char *) (src) +            \
-                                          (n) * BYTES_PER_MP_LIMB ||  \
+                                     (n) * MPFR_BYTES_PER_MP_LIMB ||  \
                         (char *) (src) >= (char *) (dst) +            \
-                                          (n) * BYTES_PER_MP_LIMB);   \
-          memcpy ((dst), (src), (n) * BYTES_PER_MP_LIMB);             \
+                                     (n) * MPFR_BYTES_PER_MP_LIMB);   \
+          memcpy ((dst), (src), (n) * MPFR_BYTES_PER_MP_LIMB);        \
         }                                                             \
     }                                                                 \
   while (0)
diff -Naurd mpfr-3.1.2-a/src/mpfr-impl.h mpfr-3.1.2-b/src/mpfr-impl.h
--- mpfr-3.1.2-a/src/mpfr-impl.h	2013-10-09 13:34:21.000000000 +0000
+++ mpfr-3.1.2-b/src/mpfr-impl.h	2014-04-15 22:21:06.220398489 +0000
@@ -191,7 +191,7 @@
 # endif
 #endif
 
-
+#define MPFR_BYTES_PER_MP_LIMB (GMP_NUMB_BITS/CHAR_BIT)
 
 /******************************************************
  ******************** Check GMP ***********************
@@ -930,7 +930,7 @@
 #define MPFR_SET_ALLOC_SIZE(x, n) \
  ( ((mp_size_t*) MPFR_MANT(x))[-1] = n)
 #define MPFR_MALLOC_SIZE(s) \
-  ( sizeof(mpfr_size_limb_t) + BYTES_PER_MP_LIMB * ((size_t) s) )
+  ( sizeof(mpfr_size_limb_t) + MPFR_BYTES_PER_MP_LIMB * ((size_t) s) )
 #define MPFR_SET_MANT_PTR(x,p) \
    (MPFR_MANT(x) = (mp_limb_t*) ((mpfr_size_limb_t*) p + 1))
 #define MPFR_GET_REAL_PTR(x) \
@@ -964,7 +964,7 @@
 #endif
 
 #define MPFR_TMP_LIMBS_ALLOC(N) \
-  ((mp_limb_t *) MPFR_TMP_ALLOC ((size_t) (N) * BYTES_PER_MP_LIMB))
+  ((mp_limb_t *) MPFR_TMP_ALLOC ((size_t) (N) * MPFR_BYTES_PER_MP_LIMB))
 
 /* temporary allocate 1 limb at xp, and initialize mpfr variable x */
 /* The temporary var doesn't have any size field, but it doesn't matter
diff -Naurd mpfr-3.1.2-a/src/mpfr.h mpfr-3.1.2-b/src/mpfr.h
--- mpfr-3.1.2-a/src/mpfr.h	2014-04-15 22:20:20.755171478 +0000
+++ mpfr-3.1.2-b/src/mpfr.h	2014-04-15 22:21:45.225450147 +0000
@@ -27,7 +27,7 @@
 #define MPFR_VERSION_MAJOR 3
 #define MPFR_VERSION_MINOR 1
 #define MPFR_VERSION_PATCHLEVEL 2
-#define MPFR_VERSION_STRING "3.1.2-p7"
+#define MPFR_VERSION_STRING "3.1.2-p8"
 
 /* Macros dealing with MPFR VERSION */
 #define MPFR_VERSION_NUM(a,b,c) (((a) << 16L) | ((b) << 8) | (c))
diff -Naurd mpfr-3.1.2-a/src/mul.c mpfr-3.1.2-b/src/mul.c
--- mpfr-3.1.2-a/src/mul.c	2013-03-13 15:37:37.000000000 +0000
+++ mpfr-3.1.2-b/src/mul.c	2014-04-15 22:21:06.224398597 +0000
@@ -106,7 +106,7 @@
   MPFR_ASSERTD(tn <= k);
 
   /* Check for no size_t overflow*/
-  MPFR_ASSERTD((size_t) k <= ((size_t) -1) / BYTES_PER_MP_LIMB);
+  MPFR_ASSERTD((size_t) k <= ((size_t) -1) / MPFR_BYTES_PER_MP_LIMB);
   MPFR_TMP_MARK(marker);
   tmp = MPFR_TMP_LIMBS_ALLOC (k);
 
@@ -301,7 +301,7 @@
   MPFR_ASSERTD (tn <= k); /* tn <= k, thus no int overflow */
 
   /* Check for no size_t overflow*/
-  MPFR_ASSERTD ((size_t) k <= ((size_t) -1) / BYTES_PER_MP_LIMB);
+  MPFR_ASSERTD ((size_t) k <= ((size_t) -1) / MPFR_BYTES_PER_MP_LIMB);
   MPFR_TMP_MARK (marker);
   tmp = MPFR_TMP_LIMBS_ALLOC (k);
 
diff -Naurd mpfr-3.1.2-a/src/stack_interface.c mpfr-3.1.2-b/src/stack_interface.c
--- mpfr-3.1.2-a/src/stack_interface.c	2013-03-13 15:37:32.000000000 +0000
+++ mpfr-3.1.2-b/src/stack_interface.c	2014-04-15 22:21:06.220398489 +0000
@@ -26,7 +26,7 @@
 size_t
 mpfr_custom_get_size (mpfr_prec_t prec)
 {
-  return MPFR_PREC2LIMBS (prec) * BYTES_PER_MP_LIMB;
+  return MPFR_PREC2LIMBS (prec) * MPFR_BYTES_PER_MP_LIMB;
 }
 
 #undef mpfr_custom_init
diff -Naurd mpfr-3.1.2-a/src/version.c mpfr-3.1.2-b/src/version.c
--- mpfr-3.1.2-a/src/version.c	2014-04-15 22:20:20.755171478 +0000
+++ mpfr-3.1.2-b/src/version.c	2014-04-15 22:21:45.225450147 +0000
@@ -25,5 +25,5 @@
 const char *
 mpfr_get_version (void)
 {
-  return "3.1.2-p7";
+  return "3.1.2-p8";
 }
diff -Naurd mpfr-3.1.2-a/PATCHES mpfr-3.1.2-b/PATCHES
--- mpfr-3.1.2-a/PATCHES	2014-06-30 15:15:25.533266905 +0000
+++ mpfr-3.1.2-b/PATCHES	2014-06-30 15:15:25.617269178 +0000
@@ -0,0 +1 @@
+div-overflow
diff -Naurd mpfr-3.1.2-a/VERSION mpfr-3.1.2-b/VERSION
--- mpfr-3.1.2-a/VERSION	2014-06-30 15:15:25.529266797 +0000
+++ mpfr-3.1.2-b/VERSION	2014-06-30 15:15:25.617269178 +0000
@@ -1 +1 @@
-3.1.2-p8
+3.1.2-p9
diff -Naurd mpfr-3.1.2-a/src/div.c mpfr-3.1.2-b/src/div.c
--- mpfr-3.1.2-a/src/div.c	2013-03-13 15:37:33.000000000 +0000
+++ mpfr-3.1.2-b/src/div.c	2014-06-30 15:15:25.585268312 +0000
@@ -750,7 +750,9 @@
  truncate_check_qh:
   if (qh)
     {
-      qexp ++;
+      if (MPFR_LIKELY (qexp < MPFR_EXP_MAX))
+        qexp ++;
+      /* else qexp is now incorrect, but one will still get an overflow */
       q0p[q0size - 1] = MPFR_LIMB_HIGHBIT;
     }
   goto truncate;
@@ -765,7 +767,9 @@
   inex = 1; /* always here */
   if (mpn_add_1 (q0p, q0p, q0size, MPFR_LIMB_ONE << sh))
     {
-      qexp ++;
+      if (MPFR_LIKELY (qexp < MPFR_EXP_MAX))
+        qexp ++;
+      /* else qexp is now incorrect, but one will still get an overflow */
       q0p[q0size - 1] = MPFR_LIMB_HIGHBIT;
     }
 
diff -Naurd mpfr-3.1.2-a/src/mpfr.h mpfr-3.1.2-b/src/mpfr.h
--- mpfr-3.1.2-a/src/mpfr.h	2014-06-30 15:15:25.533266905 +0000
+++ mpfr-3.1.2-b/src/mpfr.h	2014-06-30 15:15:25.613269070 +0000
@@ -27,7 +27,7 @@
 #define MPFR_VERSION_MAJOR 3
 #define MPFR_VERSION_MINOR 1
 #define MPFR_VERSION_PATCHLEVEL 2
-#define MPFR_VERSION_STRING "3.1.2-p8"
+#define MPFR_VERSION_STRING "3.1.2-p9"
 
 /* Macros dealing with MPFR VERSION */
 #define MPFR_VERSION_NUM(a,b,c) (((a) << 16L) | ((b) << 8) | (c))
diff -Naurd mpfr-3.1.2-a/src/version.c mpfr-3.1.2-b/src/version.c
--- mpfr-3.1.2-a/src/version.c	2014-06-30 15:15:25.533266905 +0000
+++ mpfr-3.1.2-b/src/version.c	2014-06-30 15:15:25.613269070 +0000
@@ -25,5 +25,5 @@
 const char *
 mpfr_get_version (void)
 {
-  return "3.1.2-p8";
+  return "3.1.2-p9";
 }
diff -Naurd mpfr-3.1.2-a/tests/tdiv.c mpfr-3.1.2-b/tests/tdiv.c
--- mpfr-3.1.2-a/tests/tdiv.c	2013-03-13 15:37:44.000000000 +0000
+++ mpfr-3.1.2-b/tests/tdiv.c	2014-06-30 15:15:25.585268312 +0000
@@ -1104,6 +1104,96 @@
 #define RAND_FUNCTION(x) mpfr_random2(x, MPFR_LIMB_SIZE (x), randlimb () % 100, RANDS)
 #include "tgeneric.c"
 
+static void
+test_extreme (void)
+{
+  mpfr_t x, y, z;
+  mpfr_exp_t emin, emax;
+  mpfr_prec_t p[4] = { 8, 32, 64, 256 };
+  int xi, yi, zi, j, r;
+  unsigned int flags, ex_flags;
+
+  emin = mpfr_get_emin ();
+  emax = mpfr_get_emax ();
+
+  mpfr_set_emin (MPFR_EMIN_MIN);
+  mpfr_set_emax (MPFR_EMAX_MAX);
+
+  for (xi = 0; xi < 4; xi++)
+    {
+      mpfr_init2 (x, p[xi]);
+      mpfr_setmax (x, MPFR_EMAX_MAX);
+      MPFR_ASSERTN (mpfr_check (x));
+      for (yi = 0; yi < 4; yi++)
+        {
+          mpfr_init2 (y, p[yi]);
+          mpfr_setmin (y, MPFR_EMIN_MIN);
+          for (j = 0; j < 2; j++)
+            {
+              MPFR_ASSERTN (mpfr_check (y));
+              for (zi = 0; zi < 4; zi++)
+                {
+                  mpfr_init2 (z, p[zi]);
+                  RND_LOOP (r)
+                    {
+                      mpfr_clear_flags ();
+                      mpfr_div (z, x, y, (mpfr_rnd_t) r);
+                      flags = __gmpfr_flags;
+                      MPFR_ASSERTN (mpfr_check (z));
+                      ex_flags = MPFR_FLAGS_OVERFLOW | MPFR_FLAGS_INEXACT;
+                      if (flags != ex_flags)
+                        {
+                          printf ("Bad flags in test_extreme on z = a/b"
+                                  " with %s and\n",
+                                  mpfr_print_rnd_mode ((mpfr_rnd_t) r));
+                          printf ("a = ");
+                          mpfr_dump (x);
+                          printf ("b = ");
+                          mpfr_dump (y);
+                          printf ("Expected flags:");
+                          flags_out (ex_flags);
+                          printf ("Got flags:     ");
+                          flags_out (flags);
+                          printf ("z = ");
+                          mpfr_dump (z);
+                          exit (1);
+                        }
+                      mpfr_clear_flags ();
+                      mpfr_div (z, y, x, (mpfr_rnd_t) r);
+                      flags = __gmpfr_flags;
+                      MPFR_ASSERTN (mpfr_check (z));
+                      ex_flags = MPFR_FLAGS_UNDERFLOW | MPFR_FLAGS_INEXACT;
+                      if (flags != ex_flags)
+                        {
+                          printf ("Bad flags in test_extreme on z = a/b"
+                                  " with %s and\n",
+                                  mpfr_print_rnd_mode ((mpfr_rnd_t) r));
+                          printf ("a = ");
+                          mpfr_dump (y);
+                          printf ("b = ");
+                          mpfr_dump (x);
+                          printf ("Expected flags:");
+                          flags_out (ex_flags);
+                          printf ("Got flags:     ");
+                          flags_out (flags);
+                          printf ("z = ");
+                          mpfr_dump (z);
+                          exit (1);
+                        }
+                    }
+                  mpfr_clear (z);
+                }  /* zi */
+              mpfr_nextabove (y);
+            }  /* j */
+          mpfr_clear (y);
+        }  /* yi */
+      mpfr_clear (x);
+    }  /* xi */
+
+  set_emin (emin);
+  set_emax (emax);
+}
+
 int
 main (int argc, char *argv[])
 {
@@ -1130,6 +1220,7 @@
   test_20070603 ();
   test_20070628 ();
   test_generic (2, 800, 50);
+  test_extreme ();
 
   tests_end_mpfr ();
   return 0;
diff -Naurd mpfr-3.1.2-a/PATCHES mpfr-3.1.2-b/PATCHES
--- mpfr-3.1.2-a/PATCHES	2014-06-30 15:17:53.337268149 +0000
+++ mpfr-3.1.2-b/PATCHES	2014-06-30 15:17:53.417270314 +0000
@@ -0,0 +1 @@
+vasprintf
diff -Naurd mpfr-3.1.2-a/VERSION mpfr-3.1.2-b/VERSION
--- mpfr-3.1.2-a/VERSION	2014-06-30 15:17:53.337268149 +0000
+++ mpfr-3.1.2-b/VERSION	2014-06-30 15:17:53.413270206 +0000
@@ -1 +1 @@
-3.1.2-p9
+3.1.2-p10
diff -Naurd mpfr-3.1.2-a/src/mpfr.h mpfr-3.1.2-b/src/mpfr.h
--- mpfr-3.1.2-a/src/mpfr.h	2014-06-30 15:17:53.337268149 +0000
+++ mpfr-3.1.2-b/src/mpfr.h	2014-06-30 15:17:53.413270206 +0000
@@ -27,7 +27,7 @@
 #define MPFR_VERSION_MAJOR 3
 #define MPFR_VERSION_MINOR 1
 #define MPFR_VERSION_PATCHLEVEL 2
-#define MPFR_VERSION_STRING "3.1.2-p9"
+#define MPFR_VERSION_STRING "3.1.2-p10"
 
 /* Macros dealing with MPFR VERSION */
 #define MPFR_VERSION_NUM(a,b,c) (((a) << 16L) | ((b) << 8) | (c))
diff -Naurd mpfr-3.1.2-a/src/vasprintf.c mpfr-3.1.2-b/src/vasprintf.c
--- mpfr-3.1.2-a/src/vasprintf.c	2013-11-15 00:51:49.267334408 +0000
+++ mpfr-3.1.2-b/src/vasprintf.c	2014-06-30 15:17:53.377269231 +0000
@@ -884,14 +884,18 @@
            first digit, we want the exponent for radix two and the decimal
            point AFTER the first digit. */
         {
-          MPFR_ASSERTN (exp > MPFR_EMIN_MIN /4); /* possible overflow */
+          /* An integer overflow is normally not possible since MPFR_EXP_MIN
+             is twice as large as MPFR_EMIN_MIN. */
+          MPFR_ASSERTN (exp > (MPFR_EXP_MIN + 3) / 4);
           exp = (exp - 1) * 4;
         }
       else
         /* EXP is the exponent for decimal point BEFORE the first digit, we
            want the exponent for decimal point AFTER the first digit. */
         {
-          MPFR_ASSERTN (exp > MPFR_EMIN_MIN); /* possible overflow */
+          /* An integer overflow is normally not possible since MPFR_EXP_MIN
+             is twice as large as MPFR_EMIN_MIN. */
+          MPFR_ASSERTN (exp > MPFR_EXP_MIN);
           --exp;
         }
     }
diff -Naurd mpfr-3.1.2-a/src/version.c mpfr-3.1.2-b/src/version.c
--- mpfr-3.1.2-a/src/version.c	2014-06-30 15:17:53.337268149 +0000
+++ mpfr-3.1.2-b/src/version.c	2014-06-30 15:17:53.413270206 +0000
@@ -25,5 +25,5 @@
 const char *
 mpfr_get_version (void)
 {
-  return "3.1.2-p9";
+  return "3.1.2-p10";
 }
diff -Naurd mpfr-3.1.2-a/tests/tsprintf.c mpfr-3.1.2-b/tests/tsprintf.c
--- mpfr-3.1.2-a/tests/tsprintf.c	2013-11-15 00:51:49.267334408 +0000
+++ mpfr-3.1.2-b/tests/tsprintf.c	2014-06-30 15:17:53.377269231 +0000
@@ -1184,6 +1184,69 @@
   check_emax_aux (MPFR_EMAX_MAX);
 }
 
+static void
+check_emin_aux (mpfr_exp_t e)
+{
+  mpfr_t x;
+  char *s1, s2[256];
+  int i;
+  mpfr_exp_t emin;
+  mpz_t ee;
+
+  MPFR_ASSERTN (e >= LONG_MIN);
+  emin = mpfr_get_emin ();
+  set_emin (e);
+
+  mpfr_init2 (x, 16);
+  mpz_init (ee);
+
+  mpfr_setmin (x, e);
+  mpz_set_si (ee, e);
+  mpz_sub_ui (ee, ee, 1);
+
+  i = mpfr_asprintf (&s1, "%Ra", x);
+  MPFR_ASSERTN (i > 0);
+
+  gmp_snprintf (s2, 256, "0x1p%Zd", ee);
+
+  if (strcmp (s1, s2) != 0)
+    {
+      printf ("Error in check_emin_aux for emin = %ld\n", (long) e);
+      printf ("Expected %s\n", s2);
+      printf ("Got      %s\n", s1);
+      exit (1);
+    }
+
+  mpfr_free_str (s1);
+
+  i = mpfr_asprintf (&s1, "%Rb", x);
+  MPFR_ASSERTN (i > 0);
+
+  gmp_snprintf (s2, 256, "1p%Zd", ee);
+
+  if (strcmp (s1, s2) != 0)
+    {
+      printf ("Error in check_emin_aux for emin = %ld\n", (long) e);
+      printf ("Expected %s\n", s2);
+      printf ("Got      %s\n", s1);
+      exit (1);
+    }
+
+  mpfr_free_str (s1);
+
+  mpfr_clear (x);
+  mpz_clear (ee);
+  set_emin (emin);
+}
+
+static void
+check_emin (void)
+{
+  check_emin_aux (-15);
+  check_emin_aux (mpfr_get_emin ());
+  check_emin_aux (MPFR_EMIN_MIN);
+}
+
 int
 main (int argc, char **argv)
 {
@@ -1203,6 +1266,7 @@
   decimal ();
   mixed ();
   check_emax ();
+  check_emin ();
 
 #if defined(HAVE_LOCALE_H) && defined(HAVE_SETLOCALE)
   locale_da_DK ();
